Wade Robert Hoover, 35, of Augusta, was indicted on 12 counts of gross sexual assault against a boy under the age of 12.

Kennebec County District Attorney Maeghan Maloney said Hoover is accused of assaulting the boy 12 times in a 14-month span in Augusta beginning on Dec. 11, 2008, when the boy was 10 years old, and ending Feb. 13, 2010, when the boy was 11.

Hoover originally was charged in state court with possession of sexually explicit materials after child pornography reportedly was found on his personal laptop.

He was arrested Oct. 3 at the Augusta office of the Maine chapter of the National Alliance on Mental Illness, or NAMI, where he worked.

The two boys he allegedly assaulted were his karate students, said Maloney.

“That adds to the level of pain and betrayal that the victims experienced,” Maloney said on Wednesday. “That’s why I feel strongly that Mr. Hoover has to be held responsible for both state and federal crimes.”

Hoover remains in Somerset County Jail on $100,000 cash bond, said Maloney. Maloney said she intends to seek consecutive sentences for the crimes.

Good police work led to the indictments on Friday, she said.

“The state police did an excellent job analyzing the data on Mr. Hoover’s computer when it was seized,” said Maloney. “They were able to figure out on some of the videos that the child was a child in Maine. That’s how we found that these children had been assaulted.”

Investigators went to the NAMI office after an agent with the U.S. Department of Homeland Security who was monitoring the Ares computer network saw that 10 known videos of child pornography had been made available over that network to an IP address registered to NAMI, which provides support, education and advocacy to the mentally ill and their families.

No evidence of child pornography was found on the NAMI server, according to court documents. In Hoover’s office, however, police found a laptop computer on the desk next to the office desktop computer.

Hoover allegedly admitted to investigators that he used his personal laptop computer to log into the Ares network and download child pornography. During his discussions with agents, Hoover admitted that he “has a sexual preference for … boys between 12 and 14 years of age,” according to court documents.

He faces up to 30 years in prison on the gross sexual assault charge, said Maloney.